ISA 60079-26:2011
ISA 60079-26:2011 Explosive Atmospheres - Part 26: Equipment For Use In Class 1, Zone 0 Hazardous (Classified) Locations Describes the particular requirements for construction, test and marking for electrical equipment of Group II intended for use in Class I, Zone 0 as defined in the National Electrical Code, ANSI/NFPA